The soft Peruvian fabric is soft against their newborn skin. Classic has a single layer construction which is lighter than the Premier swaddles and adds breathability. Your touch can signal comfort, security and love to your baby allowing them to calm and sleep peacefully. But it’s not always possible to hold your baby as much as either of you would like. Zen Swaddle™ mimics that sensation. Based on the medically proven benefits of simulated touch, its lightly weighted areas on either side and at the center provide the security they feel only in your arms. The Zen Swaddle™ 2 sizes in 1 design lasts twice as long from birth to 6 months. A smaller interior pouch keeps your baby's legs snug during the first few weeks, while the extra long sack offers additional leg room to grow up to 29". Made from 100% luxuriously soft cotton for your baby's tender skin, it is washer and dryer safe. AGE: 0-6 months WEIGHT: 7-18 pounds HEIGHT: 19" - 29"